I figured it out myself after a stressful night.
At first i connected both hdd again with the server.
After that i did the command:
Then it started the raid.
now i just mounted the raid in /mnt/test with:
And right now i am saving all files on my PC via FileZilla.
I know it is not the completly right way but right now I do not care because I am just glad that my data is back.